Composite desulfurizer and preparation method thereof

A desulfurizer and composite technology, applied in separation methods, chemical instruments and methods, separation of dispersed particles, etc., to achieve the effects of reducing corrosion, reducing energy consumption, and increasing the concentration of use

Active Publication Date: 2019-12-27
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is no good stabilizer introduced, the problem that the current amine liquid is easy to decompose to form a thermally stable salt has not been solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Put 35% N-methyldiethanolamine, 38.5% tertiary aminopolypropylene glycol ether and 25% diethylethanolamine into the mixing tank, mix and stir for 20min, then add 0.5% sodium molybdate, 0.95% tertiary amino silicone Oxane, 0.02% 2,4,6-tris(dimethylaminomethyl)phenol and 0.03% dimethyltin mercaptide, after using the circulation pump to circulate and return for 40min, put it into the low-pressure desulfurization system with a pressure of 8KPAG for a cycle of use More than 5,000 hours, sampling once every eight hours, the sulfur content of the purified gas is measured to be below 5ppm, the carbon dioxide is not removed, and the energy consumption of the device is reduced by 50%. This composite desulfurizer has a good effect.

Embodiment 2

[0037] 30% of N-methyldiethanolamine, 38.5% of primary amino trinitrophenol and 30% of N-(2-hydroxybutyl)-1,2-propylenediamine are mixed into a mixing tank for 30 minutes, and then Add 0.6% sodium tungstate, 0.85% tertiary aminoorganosiloxane, 0.03% 2,4,6-tris(dimethylaminomethyl)phenol and 0.02% dimethyltin mercaptide, and use the circulation pump to circulate back After 60 minutes, the low-pressure desulfurization system with a pressure of 7KPAG has a cycle life of more than 5,500 hours, and sampling is performed every eight hours. The sulfur content of the purified gas is measured to be below 5ppm, the carbon dioxide is not removed, and the energy consumption of the device is reduced by 48%. The agent works well.

Embodiment 3

[0039]36% N-methyldiethanolamine, 40% sterically hindered amine (tertiary aminopolypropylene glycol ether: primary amino trinitrophenol weight ratio 2:1) and 22.9% 4-methylmorpholine were mixed The tank was mixed and stirred for 30min, then 0.5% sodium polyphosphate, 0.51% tertiary aminoorganosiloxane, 0.05% 2,4,6-tris(dimethylaminomethyl)phenol and 0.04% mercaptan dimethyl Tin, after using the circulation pump to circulate and return for 50 minutes, put it into the low-pressure desulfurization system with a pressure of 10KPAG, the cycle life is more than 5500 hours, and the sample is taken every eight hours. The sulfur content of the purified gas is measured to be below 5ppm, the carbon dioxide is not removed, and the energy consumption of the device is reduced. 50%, the composite desulfurizer has a good effect.

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PUM

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Abstract

The invention relates to a compound type desulfurizing agent and a preparation method thereof, and belongs to the technical field of refinery gas desulfurizing. The compound type desulfurizing agent is prepared from the following raw materials in percentage by weight: 30-40% of N-methyl diethanol amine, 30-40% of steric hindered amine, 20-30% of a stabilizer, 0.5-1.0% of a corrosion inhibitor, 0.5-1.0% of a defoaming agent, 0.02-0.05% of 2,4,6-tri(dimethylaminomethyl) phenol and 0.03-0.04% of thiol dimethyl tin. The compound type desulfurizing agent is wide in scope of application, has a hydrogen sulfide removal rate of 100%, reduces circulation volume of an ammine liquid, and reduces energy consumption of devices for the process. The invention also provides the preparation method for the compound type desulfurizing agent, and the preparation method is simple, scientific and reasonable in process.

Description

technical field [0001] The invention relates to a composite desulfurizer and a preparation method thereof, belonging to the technical field of refinery gas desulfurization. Background technique [0002] Refinery gas contains carbon dioxide, sulfur dioxide, hydrogen sulfide, mercaptans and sulfides, etc. The combustion of sulfides will generate sulfur dioxide and sulfur trioxide, so natural gas and refinery gas must be desulfurized. [0003] Desulfurization solvents such as monoethanolamine (MEA), diisopropanolamine (DIPA) and diethanolamine (DEA) have been used in refinery gas desulfurization. MEA and DEA vs. CO 2 / H 2 O is poor in selectivity, prone to thermal and chemical degradation, and the solvent is prone to foaming and strong corrosion. In view of the shortcomings of the above traditional desulfurization solvents, selective desulfurization agent methyldiethanolamine (MDEA) solution and composite components mainly composed of MDEA have been used as desulfurization a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
Inventor 杨忠梅吕爱梅孟宪谭石国政侯磊朱相春
Owner CHINA PETROLEUM & CHEM CORP
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